Alaska Sen. Mark Begich will release his first television ad Monday, an attack on the conservative Koch brothers’ group Americans for Prosperity for the ads it’s been running against Begich this year.

“First it was a D.C. actress pretending to be an Alaskan,” says a narrator in the ad, which was shared early with POLITICO. “Now ads attacking Mark Begich on a carbon tax have been called false and not true.”

The ad refers to two previous anti-Begich spots from AFP: the first came under fire for featuring a Maryland actress. The second was panned by PolitiFact and FactCheck as misleading on the issue of whether Begich supported a carbon tax.

The anti-Koch brothers theme is one that national Democrats are pushing as well. Senate Majority Leader Harry Reid said last week that Republicans have a “Koch problem,” and the Democratic Senatorial Campaign Committee launched a paid advertising effort on the topic as well.

The second half of the ad features Alaskan voters talking about the Kochs — and hitting them for the closure of the Flint Hills Resources Refinery, an Alaska oil refinery owned by Koch Industries.

“They come in to our town, buy our refinery,” one man says, while another follows by saying the company is “just running it into the ground.”

“I don’t go down and tell them what to do; I don’t expect them to come to Alaska and tell us what to do,” one man says.

While this is Begich’s first TV ad, the incumbent Democrat has already released 14 radio ads in the race. The most recent radio ad also focused on the Koch brothers, calling them “outsiders” getting involved where they don’t belong.

The ad is running statewide in the Anchorage and Fairbanks markets, according to the Begich campaign, which declined to disclose the size of the buy.

AFP Alaska spokeswoman Heidi Gay said the ad shows Begich is trying to deflect attention from his positions on a carbon tax and other energy issues.

“Nowhere in the ad does Senator Begich give a coherent answer on why he pushed for a price on greenhouse gas emissions, or voted twice to make it easier to implement a carbon tax,” she said. “With Alaskans paying some of the highest energy prices in the nation, it would be nice for Senator Begich to be honest with us and stop trying to distract from his record.”